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2321-07-5

4 Inquiries

Unit Price: Get Latest Price
CAS No.:

2321-07-5

Packaging:

kg

Price valid (until):

2022-07-10

Company Type:
Manufactory
Location:
China
Payment Terms:
TT against copy of documents,D/P,L/C,D/A,O/A,100% TT in advance
Average Lead Time:
30 days
Qualification:
Main Products:

Custom Synthetic Chemicals,Biological Stains,Pharmaceutical Intermediates,Cosmetic Grade Chemicals,Enzyme,Nucleosides

  • Product Description

  • Seller Information

  • Inquiry History

  • Description

    2321-07-5

    ECHEMI Editorial Reference
    Fluorescein is a synthetic fluorescent tracer.
    Fluorescein is a synthetic organic compound available as a dark orange/red powder slightly soluble in water and alcohol. It is widely used as a fluorescent tracer for many applications.
    Fluorescein appears as yellow amorphous solid or orange-red crystals. Latter have greenish-yellow fluorescence by reflected light. Insoluble in water. Soluble in dilute aqueous bases. Very dilute alkaline solutions exhibit intense, greenish-yellow fluorescence by reflected light. Low toxicity. May be sensitive to prolonged exposure to light.|Solid
    Fluorescein appears as yellow amorphous solid or orange-red crystals. Latter have greenish-yellow fluorescence by reflected light. Insoluble in water. Soluble in dilute aqueous bases. Very dilute alkaline solutions exhibit intense, greenish-yellow fluorescence by reflected light. Low toxicity. May be sensitive to prolonged exposure to light.|Fluorescein (lactone form) is a xanthene dye that is highly fluorescent, detectable even when present in minute quantities. Used forensically to detect traces of blood, in analytical chemistry as an indicator in silver nitrate titrations and in microscopy. It has a role as a radioopaque medium and a fluorescent dye. It is a xanthene dye, a gamma-lactone, a polyphenol, an oxaspiro compound, a member of 2-benzofurans and an organic heteropentacyclic compound. It derives from a fluorescein (acid form).|A phthalic indicator dye that appears yellow-green in normal tear film and bright green in a more alkaline medium, such as the aqueous humor, and is used therapeutically as a diagnostic aid in corneal injuries and corneal trauma. It has been approved by FDA for use in externally applied drugs and cosmetics. (From Merck Index, 12th ed; American Medical Association Drug Evaluations; 1995, p2275)|Fluorescein is a Diagnostic Dye. The mechanism of action of fluorescein is as a Dye.|Fluorescein is an organic compound that has wide use as a synthetic coloring agent. It is prepared by heating phthalic anhydride and resorcinol over a zinc catalyst, and it crystallizes as a deep red powder. This agent emits an intense green fluorescence in the presence of alkaline solutions and therefore is used as a label when conjugated to antibodies or as a contrast agent for ophthalmic angiography.|A phthalic indicator dye that appears yellow-green in normal tear film and bright green in a more alkaline medium such as the aqueous humor.
    ChEBI: A xanthene dye that is highly fluorescent, detectable even when present in minute quantities. Used forensically to detect traces of blood, in analytical chemistry as an indicator in silver nitrate titrations and in microscopy.

    Basic Info
    Product Name:

    Fluorescein

    Other Name:

    FLUORESCEIN, FREE ACIDFLUORESCEIN, FREE ACIDFLUORESCEIN, FREE ACID;Diresorcinolphthalein;Tetraoxyphthalophenone anhydride;SOLVENT YELLOW 94;S NO 880;RESORCINOL PHTHALEIN;FLUORESCEIN, ALCOHOL SOLUBLE;FLUORESCEIN

    CAS No.:

    2321-07-5

    Molecular Formula:

    C20H12O5

    InChIKeys:

    GNBHRKFJIUUOQI-UHFFFAOYSA-N

    Molecular Weight:

    332.31

    Exact Mass:

    332.31

    BRN:

    94324

    EC Number:

    219-031-8

    UNII:

    TPY09G7XIR

    NSC Number:

    759114|667256

    TSCA:

    TSCA listed

    DSSTox ID:

    DTXSID0038887

    NCI Thesaurus Code:

    C61766

    Color/Form:

    Red to orange

    ATC Code:

    S01JA01|S - Sensory organs

    HScode:

    32042000

    Categories:

    Heterocyclic Compound

    Characteristics
    λmax:

    493.5nm, 496nm, 460nm, 515nm

    PSA:

    87.74000

    Physical Properties:

    The fluorescence of this molecule is very intense; peak excitation occurs at 494 nm and peak emission at 521 nm.Fluorescein has a pKa of 6.4, and its ionization equilibrium leads to pH-dependent absorption and emission over the range of 5 to 9. Also, the fluorescence lifetimes of the protonated and deprotonated forms of fluorescein are approximately 3 and 4 ns, which allows for pH determination from non intensity based measurements. The lifetimes can be recovered using time-correlated single photon counting or phase-modulation fluorimetry.

    XLogP3:

    3.4

    Appearance:

    Red to orange Powder

    Density:

    1.2739 (rough estimate)

    Melting Point:

    320 °C(lit.)

    Boiling Point:

    429.44°C (rough estimate)

    Flash Point:

    232.6±25.0 °C

    Refractive Index:

    1.5000 (estimate)

    Water Solubility:

    insoluble

    Storage Conditions:

    −20°C

    Vapor Pressure:

    4.1X10-14 mm Hg at 25 deg C (est)

    PKA:

    2.2, 4.4, 6.7(at 25℃)

    Henrys Law Constant:

    1.1×1011mol/(m3Pa) at 25℃, HSDB (2015)

    Collision Cross Section:

    172.3 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine and drug standards]

    Experimental Properties:

    Fluorescein is a fluorescent indicator. From pH 4 to pH 4.5, it changes from colorless to green fluorescent.|Hydroxyl radical reaction rate constant = 2.0X10-10 cu cm/molec-sec at 25 °C (est)

    Air and Water Reactions:

    Insoluble in water.

    Reactive Group:

    Acids, Carboxylic

    Reactivity Profile:

    Fluorescein is incompatible with strong oxidizers. Also incompatible with acids, acid salts and salts of heavy metals. .

    Critical Temperature & Pressure:

    room temp

    Hazard Identification

    Classification of the substance or mixture

    Eye irritation, Category 2

    GHS label elements, including precautionary statements

    Pictogram(s)
    Signal word

    Warning

    Hazard statement(s)

    H319 Causes serious eye irritation

    Precautionary statement(s)
    Prevention

    P264 Wash ... thoroughly after handling.

    P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...

    Response

    P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

    Storage

    none

    Disposal

    none

    Other hazards which do not result in classification

    no data available

    Handling and Storage

    Precautions for safe handling

    Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

    Conditions for safe storage, including any incompatibilities

    Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

  • Seller Information
    Business Type:

    Manufactory

    Main Products:

    Custom Synthetic Chemicals,Biological Stains,Pharmaceutical Intermediates,Cosmetic Grade Chemicals,Enzyme,Nucleosides

    Location:

    Room 308-80, building 1, 1963 Huaguan Road, Tianhe District, Guangzhou

    Payment Terms:

    TT against copy of documents,D/P,L/C,D/A,O/A,100% TT in advance

    Average lead Time:

    30 days

    Total Annual Revenue:

    $5 million-$10 million

    Total Employees:

    51-100

    Year of Establishment:

    2021

    Guangzhou Yaoguang Technology Co., Ltd. is a high-tech enterprise specializing in the R&D, manufacturing, and custom synthesis of fine chemicals, whose management has many years of experience in fine chemicals.

    The company has established a core technical team with professors, engineers, doctors, masters and undergraduates as the backbone power, and has equipped with advanced synthesis equipment, high-tech analytical instruments and mass production equipment, which can allow us to meet the requirements of customers. The company adheres to the operation philosophy of "Credit and Quality Come First". Taking advantage of combining production, study and research, it has established strategic partnership with many universities and key laboratories in China.

    We are an ISO 9001-2015 certified enterprise, our products are widely used in life science, pharmaceutical science, biological science, materials, daily chemical, cosmetics, organic synthesis, catalyst, detection-analysis and other fields. The main products include biochemicals, organic intermediates, specialty chemicals, chemical reagents, custom-synthetic chemicals…etc., which can meet customers’ needs varying from gram level, kilogram level to ton level.

    Through years of accumulation, BTO has 2 subsidiaries, 5 offices. Our products are sold to China, Europe, America, Japan, South Korea and other countries and regions, have been recognized and trusted by global customers.

    Instrument and Equipment: multiple sets of lab/pilot scale test reaction equipment, freezing equipment, rectification equipment, dephlegmator, HPLC, GC, GC-MS, LC-MS, X-RAY, IR…etc.

  • Inquiry History
    4 Inquiries
    Country Product Purchase Quantity Date Posted
    India

    Fluorescein

    10.00 KG Nov 22, 2023
    United States

    Fluorexetamine

    1 G Nov 16, 2023
    India

    OPTICAL BRIGHTENER FP127

    1.00 MT Nov 22, 2023
    India

    OPTICAL BRIGHTENER OB

    1.00 MT Nov 22, 2023
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